This is a good question Fjell, and one we wish we could answer easily.
There are loads of P-anchors in Lancaster Hole not shown on the topo, allowing for a variety of creative routes down the main shaft. As for which ones were installed as part of the CNCC anchor scheme (presumably in the early 1990s for Lancaster Hole), we can only confidently say those shown in the topo, which is the classic route.
Many of the other P-anchors may have been installed under the early CNCC scheme, but are not depicted on the topo. This needs some research, and we will try to investigate the records.
We are actively discussing non-CNCC approved stainless steel resin anchors installed prior to the current scheme, including the ones on the Bar Pot alternative pitch, and Dale Head Pot, and possibly those extra anchors in Lancaster Hole. We are trying to decide whether these historic anchors should be retrospectively approved subject to an inspection/test, or whether they should at least be shown on topos with a cautionary note. We'll discuss this in our June meeting if anyone is interested.
We will look into this and maybe we can get the Lancaster Hole topo updated to reflect two separate hangs... as you say, this would be useful.
Obviously this doesn't fix a bottleneck in the entrance... There's always Cow Pot for more experienced cavers to escape the traffic if water levels allow